Automatic telephone system



June 8, 1965 w. H. BLASHFIELD AUTOMATIC TELEPHONE SYSTEM Original FiledAug. 13, 1957 5 Sheets-Sheet l June 8, 1965 w. H. BLAsHFlELD 3,188,395

AUTOMATIC TELEPHONE SYSTEM Original Filed Aug. 13, 1957 5 Sheets-Sheet 2mOPUmZZOO OPOmZZOU OPumZZOU 0H June 8, 1965 w. H. BLASHFIELD 3,188,395

AUTOMATICV TELEPHONE SYSTEM Original F'iled Aug. 13, 1957 5 Sheets-Sheet3 STATION NUM- BER TEST Hll INVENTOR. WILL/AM H. BLASHFIELD June 8, 1965w. H. BLAsHFlELD 3,188,395

AUTOMATIC TELEPHONE SYSTEM Original Filled Aug. l5, 1957 5 Sheets-Sheet4 m RE OF TH Nm E mobmzzou Vm. o N 1?, 525 1H. EDE 35E M m L H. W mz:X235 m mi June 8, 1965 W. H. BLAsHFlELD 39II88395 AUTOMATIC TELEPHONESYSTEM Original Filed Aug. 13, 1957 5 Sheets-Sheet IDENTIFIER for TRUNKGROUP IDENTIFICATION LEADS INVENTOR. WILLIAM H, BLASHFIELD BYMM/q M@ VMUnited States Patent O 3,183,395 .auroit/mate rnrarrronn SYSTEM WilliamH. Blashfield, Galion, Ohio, assigner to North Electric Company, Galion,Ohio, a corporation of Ohio Continuation of application Ser. No.677,953, Aug. 13, 1957. This application .iuly 24, 1962, Ser. No.214,782 22 Claims. (Cl. 179-17) This application is a continuation of mypreviously filed copending application, Serial No. 677,953, which wastiled August 13, 1957, now abandoned, and the benefit of the filing dateof the copending application, Serial No. 677,-`

953, is claimed for this application.

The present invention relates in general to automatic telephone systemshaving toll ticketing equipment and in particular to a novel lineidentification arrangement yfor use with automatic toll ticketingequipment.

The constant demand for expansion and improvement of telephone servicein recent years hasiresulted in the increased use of the so-calledautomatic toll ticketing equipment which is adapted to place theextension of a connection to local and distant subscribers under thedirect control of the calling subscriber, and which responsively andautomatically provides a ticket or record of the complete dataconcerning each call of such type which is established over theexchange.

Although toll ticketing equipment offers many obvious and practicaladvantages, the incorporation of many of the known types of tollticketing apparatus in existing automatic and manual exchanges isconsidered extremely impractical by reason of the high cost of theequipment required for such installation. As a result, much of theequipment is limited in its use to long haul, high density areas such asare common to metropolitan districts.

One toll ticketing system which has proven quite exible in itsapplication is taught in the copending application to Blashfield etal.which was filed July 23, 1951, and issued as Patent No. 2,782,257, andwhich was assigned to the assignee of this invention. ln sucharrangement, initial cost and upkeep is at least partially minimized byproviding equipment wherein the subscriber identifies himself by dialinghis own directory number for identification purposes` prior to thedialing of the directory number of the desired subscriber. Manifestly,such type system permits the elimination of a large amount of expensiveautomatic identifier units and renders feasible the inclusion ofautomatic toll ticketing equipment in smaller exchanges which may havelow volume, low rate traffic conditions. It is apparent, however, thatin certain installations, as for example, business installations whereinthecalling subscriber makes a large number of daily interexchange calls,

i the dialing of the calling subscribers number prior to the dialing ofthe called subscriber number becomes time consuming and burdensome. Itis a particular object of the present invention therefore to provide asystem which incorporates the features and advantages of such system,and which is additionally operative to provide a record of the dataconcerning each call responsive to the dialing of a single digit by thecalling subscriber.

It is a further object of this invention to provide a i system havingthese features which is comparatively economical in cost and which isreadily included in existing exchanges with the addition of a minimumamount of conversion equipment.

A feature of the present invention is the manner in which thearrangement provides identification for the different parties inexchanges connected according to a terminal per station or a terminalper line pattern with equal facility, the identification in eachinstance being accomplished merely by dialing a single digit.

v A further feature of the invention is the novel manner in which aseries of simple resistance networks connected betwen the subscriberlines (or trunks) and a set of marking conductors are used to mark theidentity of the calling subscriber thereon, and the manner in which. theidentifier unit quickly scans the conductors for the purpose ofascertaining the identity of the calling party as marked thereon, andsupplies such information to the recorder equipment. Suitable means' forguarding against fraud may be included in the arrangement to guardagainst the erroneous allocation of a toll ticketing charge tothe wrongparty, as more fully taught in the above-identified copendingapplication. i

Other features and advantages of the novel toll ticketing system will beapparent with consideration and reference to the following specificationand drawings, in which:

FIGURE 1 illustrates in block form a telephone system of a known typeinthe field including the novel line identiiication equipment;

GENERAL DESCRIPTION A. Call from recorder office I0 non-recorder olceThe novel line identification arrangement of the invention may beincluded in many known types of exchanges, and for purposes ofillustration, such arrangement has Vbeen set forth in FIGURE l of thedrawings in its manner of inclusion in an existing installation atSandpoint, Idaho.

For purposes of simplicity, the drawing of the telephone system islimited to a disclosure of the switching equipment in a recorder officeA and a non-recorder oiiice B, and such portions thereof which areconcerned with the line identification operation. A brief considerationat this time of the manner in which a call is established from therecorder office A to the non-recorder oiiice B will best serve togenerally identify the exchange switching components including the novelline identification equipment, and the manner of operation thereof withsuch components in the establishment and recording of an interexchangecall.

Briefly, as a subscriber, such as the illustrated subscriber havingsubstation removes his receiver from the hook switch associatedtherewith, a connection is extended over an associated line circuit itilto conventional switehing equipment M2 in the recorder office A. Inorder to make a toll ticketed call the calling subscriber dials thefollowing information in the following order:

(1)A toll ticketing access digit(s) which routes the call into tollticketing equipment. For example, we shall use digit 8 in the followingdescription.

(2) The calling party digit for the purpose of identifying to the tollticketing equipment from which party on the line the call originated.

(3) The 2-5 (ie. seven digit) called telephone number. The first threedigits of this number indicate the called office and will be called theoffice code and the last four digits will be called the station number.

As the subscriber first dials the toll ticketing access digit 8, theswitching equipment 102 in the recorder oiiice A routes the call overthe switches therein to an idle one of a group of recorders, such asillustrated recorder 103, which in turn seizes a register sender, suchas illustrated register sender 1M.

As the calling subscriber now dials the assigned sub- 3 connections tothe seized register sender 1li-t which responsively stores same in theparty register for identitication purposes as hereinafter described.

The calling subscriber next dials the seven digit calledsubscriber'station number over the established connection to therecorder, and the recorder responsively effects operation of anassociated tape punch unit 1% for the purpose of making a record of suchdigits thereon, and additionally transmits such digits to the seizedregister-senders lltlfl.k With the receipt of the rst four digits,registersender 1134 seizes a common translator 11) for use in extendingthe connection to the desired exchange. The translator 11@ deletes anyunnecessary digits which are stored in the register-sender 104, insertsany necessary routing digits therein, and then restores.

The sender portion of register-sender 1M. next trans- ,mits digits foundin the registers (with the exception of the last digit of the calledsubscriber directory number) clearing each digit register after thatdigit has been sent in preparation for re-use for storing the callingnumber as described hereinafter. T he routing digits are extended overselector 1% which is tied to recorder 103 and over trunk 117-125-116 tothey switching equipment 115 in the non-recorder oice to control same inthe establishment of a connection in the direction of the desiredsubscriber.

Thereupon the register-sender 1M seizes the common identifier circuit107, the party control circuit 169, and tone circuit 198, which haveaccess over the identifier networks 111, 112, in the recorder otlice tothe trunk and subscriber line circuits thereof. As identifier circuit107 recognizes the call as having originated at recorder office A, theidentifier stores the calling office code in the otice code digitregister of the register-sender 164, and thereafter scans the lineresistor and cross connect network 112 for the first digit of thecalling station number.

vVith the determination of the value of the rst digit of the callingstation number (which is accomplished in a manner to be described morefully hereafter), the digit is registered in the register-sender 1Mwhich operates responsively thereto to transmit the remaining digit ofthe called number over the established connection to the switchingequipment in the remote exchange to control same in the furtherextension of the connection. Simultaneously the identifier 107 proceedsto complete identiication of the calling station number and to storesuch number in the register-sender 194. With the completion of thetransmission of the called number, recorder 1113 causes the tape memberto be advanced a predetermined number of steps for spacing purposes.

With the transmission of the last digit of the called number, theregister-sender 1M transmits the calling ofce and calling stationidentification digits via recorder 1% to the tape punch 1995 to eifectrecording of such information thereon. Register-sender lid-l nowrestores.

At this time the switching equipment 115 in the nonrecorder office B haseffected the extension of the call over the line circuit 114 tosubstationll of the desired subscriber, and ringing signals are appliedtheretoA As the called subscriber answers, a signal indicating suchrespouse is transmitted over the established connection to Vthe recorder1&3 to cause same to seize a common cloclr 123 and common calendar 12d.Calendar 124 transmits pules to the tape punch 1.@5 via recorder 1413indicating themonth, day, hour and tenth of an hour at which the callwas answered. Calendar 124 also transmits the rst minute punch to berecorded on the tape and then restores. As the conversation proceeds,clock 123 transmits fractional minute impulses to the recorder 133 whichcounts the pulses7 and sends minute pulses to the tape punch 105 tocontrol same to record on the tape member Y terminates transmission ofminute pulses to the tape punch 1155, and as the calling subscriberreplaces the handset, the

connection is released. lf the calling subscriber restores first, theconnection is released immediately.

B. Call from non-recorder office to recorder oce The manner ofestablishing a connection from a sub scriber in a non-recorder office Bto a recorder oice A f idle trunk, such as illustrated trunk 116 in thenon-recorder otlce, and `an associated trunk 117 in the recorder oce.Additionally digit 8 selected the trunk over a path without pulse WOPwhich marked the trunk 116 to advance the call to the distant trunkcircuit 117 without "dual function pulse, whereupon the trunk circuit117 routes the call ti rough a cut-through selector 113 in the recorderoffice to an idle one of the recorders, such as illustrated recorder193. The seized one of the recorders 1613, in turn, -responsively seizesa register-sender 104. Parenthetically, if the calling subscriber inofice B had reached the trunk by dialing O instead of 8, the trunk wouldhave been reached over a path with pulse WP such that the trunlr circuit16 would have sent a dual function pulse over the trunk line 125 to thetrunk circuit 117 in the recorder office; and the trunk 117 in responsethereto would have routed the call tothe operator.

The Vcalling subscribers party digit as dialed by the callingsubscriber, is transmitted over the established connections and storedin the calling party register in the recorder oce register-sender1li-tl. Aiso, this digit is stored in party register 1% in trunk 116 ifthe calling office B is terminal per station.

The subscriber then dials the called seven digit number, the impulses ofwhich are transmitted over the existing connection to recorder 163 inthe recorder office which in turn controls tape punch 1515 to make arecord thereof, and simultaneously stores each digit in the seizedregistersender 1M. in response to the storage of the lirst four digitstherein, register-sender itl-4l seizes the common translator 11b.

Translator B deletes any unnecessary digits stored in the registersender 104, supplies any necessary routing digits to the registersthereof, and restores. T he sender equipment in the register-sender 194transmits the digits found in the registers (with the exception of thedigit in the last register) to selector 1% which is tied to recorder 103to thereby extend the connection in the direction of the desiredsubscriber. At this time register-sender 1li/el seizes the commonidentifier 167, party control circuit 169 and tone circuit 1%.

identifier 107 operates in the manner more fully described hereinafterfor the purpose of determining whether the connection is incoming over atrunk group, and in such event, the particular trunk group over whichthe call originated. identifier 167 effects such examination via trunkresistor network and cross connect 111, and upon determining the trunkgroup involved, transmits such information for storage in the olricecode registers in the register-sender 14M. The identier 1t?? thereuponadditionally transmits a signal over register-sender 164,

recorder 103, cut-through selector 113 and trunk circuit 117 to trunkcircuit 116 requesting same to engage the identifier 119, tone circuiti12-ft, and party control circuit 121 in the non-recorder office. Theidentifier 119 is similar to that of FIGURE 2 and the principle ofidentification used is the same as that already described.

dentier 119, examines line resistor network and cross connect circuit122 for the digits of the calling station number and transmits theinformation thus obtainedV in impulse form over trunk 116-125-1117 andselector 1115, recorder 193 to register-sender 104.

` recorder oiiice to a non-recorder office.

i after).

With the registration of the first of these digits in the`register-sender 101i, the remaining digit of the called num- After thelast digit of the called number is transmitted, the register-sender 11Min the recorder office transmits the calling otiice and calling stationidentification digits l over the recorder 1ti3 to` the tape punch 165for recording i described.

As noted above, in an exchange in which the subscriber lines `areconnected according to a terminal per station pattern, the party digitdialed by the calling subscriber is stored in the trunk register 126 inthe nonrecorder oiiice. Such storage is necessary in that the differentsubscribers on the line have different directory numbers and the partydigit thus stored provides the necessary identification to the localidentier equipment, such as identiiier 119, resistor network 122 etc.,as to which one of the particular one ofthe subscriber directory numbersassociated with such line is to be transmitted to the recorder oliice.

In an exchange in which the subscriber lines are conas the last digit ofthe directory number, and accordingly may be relayed by the sender tothe tape punch.

The difference in such systems is more fully described hereinafter, andthe operation of the equipment in the i different types of exchange willbecome more apparent therefrom.

It is also noted that the foregoing descriptions are concerned With theextension of a call by a subscriber from a non-recorder office to arecorder oflice, and from a In the extension of a` call from anon-recorder oice over a recorder oiiice to any other office, theoperation `of the switching equipment is similar to that described inthe matter of the extension of a call from a non-recorder otiice to arecorder ofiice. The register-sender, such as illustrated registersenderlil-t, in such eventl however provides appropriate digits for thepurpose of routing the call through the one of the exchanges whichincludes the desired subscriber.

SPECIFIC DESCRIPTION As noted hereinbefore, the invention isspeciiically concerned with a novel arrangement in which the callingparty identies himself for toll ticketing purposes by dialing a singledigit (identified as the party digit herein- For exemplary purposes, thenovel line identitication equipment is shown, in its connection andoperation, in a system of the general type illustrated in FIG- URE 1.The showing in FIGURE 2 illustrates the operation thereof in a systemwhich is connected on the terminal-per-station basis, and the showing inFIGURE 3 illustrates the connection and operation thereof in a systemwhich is connected on the terminal-per-line basis.

The connection of an exchange according to these two patterns is wellknown in the art and accordingly only a brief resume of sucharrangements is` given hereat. It is well known, for example, that anautomatic telephone system basically consists of a series of automaticswitches which are operative in response to the dialing of a directorynumber by a calling subscriber to extend a connection to a set ofterminals which has the desired subscriber connected thereto, suchterminal sets being conventionally located in an exchange connectorswitch. The manner in which the desired subscriber on the line issignaled as the call is extended to the desired terminal set will varyin accordance with the particular pattern of connection of thesubscriber lines to such terminals.

More specifically, in a terminal per line arrangement each line in theexchange is connected to one terminal set in the connector switch whichis assigned thereto, and the switching equipment reaches each of thesubscriber substations on such lineover the assigned terminal. Sinceeach of the stations is accessed over a common terminal set, it isapparent that each of the stations connected to such line must have as aportion of its directory number, the number assigned to such terminalset. In such arrangement, the directory number for each subscriber willinclude in addition to the common portion, an extra digit which isdesignated as'the ring digit, and the ring digit distinguishes betweenthe parties on the line for ringing purposes. ,That is, a iirst partywill be assigned digit 1, a second party on the line will be assigneddigit 2, etc., and a `different ringing frequency is applied to the linewhich is consistent with the ringingV digit of the desired subscriber.

In exchanges in which the subscriber lines are connected on theterminal-per-station basis, each subscriber substation in the exchangehas an individual final terminal set in the connector switches, and eachsubscriber substation is therefore assigned the directory number oftheindividual terminal set to which it is connected. In an exchange inwhich the subscribers are connected according to such pattern, a partyline (one which has a number of`subscribers connected thereto) willnecessarily be Vconnected to each of the different terminal sets whichare provided for each of the different substations which `are to beconnected to the party line. Obviously, in such type exchange thedirectory numbers of the various parties do not necessarily have commondigits representative of line terminals, and by reason of the differentdirectory numbers for the dilferent subscribers on a party line, a ringdigit is not required for signalling purposes as in terminal-per-linetype exchanges, ringing frequencies for the various parties beingdetermined by arbitrary cross-connect.

,Manifestly, the manner of ascertaining the calling subscriber'will bedifferent in a terminal-per-station and a terminal-per-line`arrangement, and the following description is concerned with the twodifferent types of connections which are provided for the alternativepatterns.

TERMINAL PER STATION IDENTIFICATION With reference to FIGURE 2, there isshown therein the manner in which subsets such as lltitlA, 160B, 100Cand D are connected in an exchange of the type shown in FIGURE 1 whichis connected according to the terminal-per-station pattern.

In such showing, a plurality of lines including party line 1234 havingstations 1110 and 1111; and party line 2317 having stations 0111 and011@ are illustrated in Vnierals 1234 for a party line in theterminal-per-station arrangement are used to designate the entranceor`orig inating call terminals of the line, whereas llllll and Mil) ofthe stations on the line are used to designate 'the called or connectorterminals of the two stations on party line i234. Obviously in sucharrangement the P-wire terminal i234 is cross connected by intermediatedistributing frame jumpers to P-wire terminals lill and lllllf. Theparty line 2317 having stations 0111 and ull@ connected thereto has itsoriginating P-wire terminal cross-connected in a similar manner to theconnector P-wire terminals associated with the two stations @lll andtlllfi. The P-wire terminals of the party lines 1234 and 237 areconnected in conventional manner to associated line circuits such as114A and 114B over which access is gained to conventional links in theswitching equipment 102.

According to the invention, the P-wire terminals of each of the stationson a party line are also permanently connected to the input B terminalof an associated resistor identification network, each station havingits own individual network for identification purposes. As shown inFiGURE 2, the P-wire terminal for station llllll is connected to theinput B terminal 2M of the identification marking means 2G65 which isindividual to such station; the P-wire terminal for station 1116i isconnected to input terminal 209 for identification network 238;V theP-wire terminal for station 0111 is connected to the input terminal 217for identification network 216, and the P-wire terminal for station 0110is connected to the input terminal 2274 for identification network 233.A control A terminal such as 267, 21S, 22, 229', for each of thenetworks 206, 208, 216, 223, etc., are cross connected through the partycontrol circuit R09 over individual rectifiers such as 224A-224D, tolever contacts 226, 227; 228, 229 of the first and second party relays,such as 225, 23u, the operation of which will be described more fullyhereinafter.

The party control circuit 199 is connected over conductor 232 to theregister sender 104, and is controlled in its operation by signalsreceived over such connection from the register sender, the nature ofthe signal being determined by the value of the calling party digitwhich was dialed into the register sender 164 by the calling party foridentification purposes.

Each identification marking means, such as 2th), coniprises in additionto the input and control terminals 201, 207, a resistor 262 (in thepresent embodiment 22K) connected between the input and controlterminals 2M, 207, and additionally to a resistor network comprised of aplurality of resistor identification elements 2k3-2%, each of which isin the order of HWK in the present embodiment. The output side of theresistors @i3-2% in the network are connected to a common marking meanswhich includes a plurality of identification leads THi- THf), Hi-Hfi,Til-Til, Uit-Uil, which in turn are connected to the identifier circuitM7. More specifically, each resistor of a network is connected to anindividual one of the identification leads which corresponds to anassigned one of the digits of the station number for its associatedstation. Thus for station lllllll the first resistor 293 will beconnected to the first thousands identification lead THll; the secondresistor 2M will be connected to the first hundreds identification leadHi; the

third resistor 265 will be connected to the first tens identificationlead T1; and the fourth resistor 2% will be connected to the first unitsidentification lead Ul. The manner of connection of theremaining'networks in the exchange to such leads will be obvioustherefrom.

The identification arrangement additionally includes a `similar set ofidentification marking leads TC, Tlf-Til, upon which a trunk in useidentities itself in coded fashion for detection by the identifiercircuit 67.' More particularly, with reference to the trunk H7, it willbe apparent that the P-wire terminal of said trunk is connected to anassociated link of the exchange switching equipment 102 in theconventional manner as more fully indicated in the block diagram ofFlGURE l. The lwire teriinal of said trunk is also permanently connectedto an associated resistor identification network, such as 23d, whichincludes a pair of resistors 235 and 236. One of the resistors, such asresistor 235, of said trunk network is connected to a trunk common leadTC, and the other one of the resistors of said trunk network isconnected to the one of the ten identification leads TTL-Til whichcorresponds to its trunk group. The connections of the individualresistor identification networks 237, 240, 243, for trunks llilB, C, D,respectively, will be obvious therefrom. it should be observed thattrunks il' and lllA belong to a trunk group l; and that trunks 117B and127C belong to a trunk group 0.

It is apparent from the foregoing description that the resistancenetworks, such as 234 for the trunks, and the resistor networks, such as2%, for the subscriber lines are connected to provide indications to thetrunk marking leads TC-Tt, and the line marking leads THl-U,respectively, whenever their associated equipment is in use.

rl`he trunk marking leads TC-T and the subscriber line marking leads THl-Utl are, in turn, each connected over an individual 50G ohm resistorto negative battery, and, as shown in the right-hand portion of FIGURE2, are terminated in individual terminals in the identifier circuit 107.

The identifier 197 basically comprises survey circuit 250 including ascanning or finder switch which as operated is enabled to scan over theterminals for the purpose of ascertaining the particular marking leadswhich have been energized by the identification network associated withthe calling subscriber. To this end, the scanning switch (which may beof the all relay or mechanical type) is connected over cable 246 to atone detector circuit 247 in the tone circuit M8. As will be more fullydisclosed hereinafter, the tone circuit E08 also includes a tonegenerator 248 which is operative during the identification procedure toapply tone over the llwire circuit which has been established in theconnection, which circuit includes the calling line or trunkP-wireterminal, the particular one of the resistor networks, such as2ti0or 234, associated with the call, and the identification leads marked bysuch network to the identifier 167 and tone circuit 108. As the surveymeans is operated in the identification of a line to advance over eachof the identification leads, the detector circuit 247 is connected bythe survey circuit to each of the identification leads for the purposeof determining the particular ones of the leads which have been marked,and the survey circuit 2S@ and tone detector circuit 247 in suchoperation provide a common detector o means for the identification leadsin the system.

According to a feature of the invention more fully describedhereinafter, the identier M97 first surveys the common trunk terminal TCto determine if the call originated from a trunk. It such identificationis present the identifier searches the trunk identification leads 'Fi-T0for the identity of the trunk group. If trunk identification is notfound on the TC lead, the survey circuit skips the trunk terminals,marks the call as one of local origin, and surveys the subscriber lineidentification leads THl-Ut) to determine the identification of thecalling station.

't l 224A, contacts 229 and ballast lamp 266 to battery, and

the resulting current fiow causes the rectitier to conduct and shunt`the tone sufficiently to prevent the appearance of tone on the markingconductors connected to the resistors 2131-214 of the resistoridentification network 208 for station 1110.

With reference now to the P-wire terminal for station 1111 (party l andthe calling `subscriber in the present example) and the network 260associated therewith, it wiil be apparent that the tone applied over theP-wire connector terminal of station 1111, the input terminal 201 andresistor 202 will not be shun-ted by the circuit extending over controlterminal 207, and accordingly tone will be applied over the resistors203-205 to the marking leads connected thereto. That is, since partyrelay 225 (party l relay) is in the restored position by reason of theinformation supplied by the calling sub- 'scriber to the party register250 in register-sender 104 and thence to the party control circuit,direct ground will be applied over contacts 226 to the control circuitfor the network 200. With ground connected to the right side ofrectifier 224C, and the opposite side of the rectifier connected to thevoltage divider in network at a point more negative, no current willflow through the rectifier, and the tone will pass over resistors203-206 to marking leads TI-IL, H1, T1, and U1, respectively.

With the seizure of the identifier 107 by the registersender 104, thesurvey circuit 250 operates to scan the .marking leads TCeUfi for toneon the different conductors. was initiated by the subscriber' at station1111, there will In that it has been assumed that the present call be.an absence of tone on the common trunk conductor TC, and the'surveycircuit accordingly effects the transmission ot local office code digitsover cross connect circuit 251 and cabie 252 to the office register 253in register sender 104. The identifier 107 simultaneously controls thesurvey circuit to bypass the trunk conductors 'f1-T0 and to examine thelead "H11-U0 for the purpose of determining the identity of the callingone of the local subscribers. As the survey circuit advances to thefirst thousandths conductor THl, the tone which is applied thereto overresistor 203 is resistor identification network 200 for station 1111 isextended over the survey circuit conductor 245 and tone detector 247 tobattery.

Tone circuit d responsively transmits a signal over conductor 271indicating that tone has been found, and the survey circuit 250thereupon transmits a signal over cable 256 to the station registers 257in register-sender 104 to effect registration of the thousands digit 1in the first register of the group 257. The register-sender 104 inresponse to the registration of the first station digit transmits thelast called digit to the tape punch and initiates transmission of thecalling office and station digits to the tape punch 105.

The survey circuit 250 advances in its scan over the remaining thousandsmarking leads TH2-THO (which will not have tone on them in the presentexample), and thereafter to the hundreds marking leads Hit-H0. Asindicated above tone over resistor 204 of resistance identificationnetwork 200 will appear on hundreds marking lead H1, and as a result ofthe detection of such tone by the survey circuit Z50 and detector 247,the tone circuit 108 signals the identifier 107 over conductor 271 thattone has been found on hundreds marking lead H1. The survey circuit 250thereupon transmits the hundreds digit l over cable 256 to the secondregister of the station register 257 of register-sender 104.

The survey circuit 250 scans the remaining marking leads in thehundreds, tens and units groups in like manner, and effects theregistration of the tens and units digits as determined to the third andfourth station registers respectivelyl in the group of registers 257 inregister-sender 104. As the identifier 107 completes its scan' in thismanner, associated equipment therein effects the l2 restoration of theidentifier 107, the party control 109 and tone circuit 10S.

During this period the register-sender 104 has been sending the callingoffice and station digits to tape punch 105 for recording thereon andcontinues in such operation until each of the digits has been thusrecorded. Thereafter the register-sender 104 releases.

It is apparent from the foregoing description that if the second station1110 on the party line 1234 had initiated the call and the party hadproperly identified himself by the transmission of the party digit 2,the second party relay 230 in party control circuit 109 would not haveoperated instead of the first party relay Z25,

and tone would have been extended from the line P-wire terminal 1234over connector terminal 1110 andthe resistor members of the associatedresistor identification network 20S to marking leads rITI-I1, H1, T1 andU0, respectively. The identier 107 in its operation would detect thepresence of tone on such leads and effect the registration of theidentification number 1110 on the station registers 257 of theregister-sender 104.

The manner in which the identification equipment is operative with theestablishment of calls by subscribers at stations 0111, 0110, on line2317, etc., is believed to be readily apparent from the foregoingdisclosure.

EXTENSION OF A CALL FROM A NON-RE` CORDER OFFICE T O A SUBSCRIBER IN ARE- CORDER OFFICE OR THROUGH A RECORDER OFFICE T0 A SUBSCRIBER IN ADISTANT OF- HCE Assuming for purposes of illustration that a call isincoming from the non-recorder ofiice, such as office B over trunk line125C of trunk 117C in trunk group 0 in the recorder oice A, the callingconnection will be extended into the associated trunk selector of theswitching equipment 102. Assuming the selector to be of the cut-throughtype, the connection is extended into an idle one of the recorders, suchas illustrated recorder 103,

which responsively seizes associated register-sender 104. The partydigit then dialed by the subscriber is extended over the -I- and leadsof the trunk 117C, the associated Selector, and the recorder 103 to theparty digit register 2e@ in the register-sender 104.

The calling subscriber now dials the called office code and the digitsof the called subscribers station number which are stored in theappropriate ones of the registers in register-sender 104 and aresimultaneously recorded on the tape by tape punch 105. Register-sender104 seizes translator 110 after the first four digits dialed have beenreceived.

The translator 110 stores the necessary routing digits in routeregisters Zoll of the register-sender 104 and restores. The senderportion of register-sender 104 thereupon transmits the calledinformation found in the registers with the exception of the last dig-itof the called subscriber station number. At this time the registersender104 at the recorder office A seizes the common identifier 107, the partycontrol circuit 109, and the tone circuit 103, the identifier and tonecircuits being seized via guard circuit 270. Y

With the seizure of the tone circuit 108 and identifier circuit 107,tone generator 24S sends tone over the guard c1rcuit and register-sender104 to the P-Wire of the recorder 103 and the P-wire of the connectionextending o ver the selector to incoming trunk 117C and the resistoridentification network 243 associated therewith. Such tone thereupon isextended over the first resistor 244 to the common trunk lead TC and thesecond resistor 245 to the trunk marking lead T0 for trunk group 0.

It was noted previously that the identifier `107 in scanning theterminals, initially tests the common trunk conductor TC to determinewhether Vthe connection has been established over an incoming trunk. Inthe present example, the trunk detects the tone on conductor TC and 13advances over each of the trunk marking leads T1-I`0 in search ofidentification tone for the trunk in use.

As the detector advances t-o the marking lead T0, the tone placedthereon over resistor 245 in network 243 will indicate to the identifierthat the calling trunk is iu the trunk group, and the identifier 107transmits the calling ofrice code digits over cross connect circuit 251and cable 252 to the group of oiiice register 253 in register-sender104.

At this time the line identifier transmits a signal to the seized trunk117C which in turn relays such signal to the distant trunk circuit tocontrol same to engage the distant identifier 119, line resistor networkand crossconnect circuit 122 and tone circuit 120 (see FIGURE 1).

The distant identifier 119 scans the line resistor network andcross-connect 122 to determine the calling directory number and relayssame in impulse form over the connection to the recorder officeregister-sender 104 for storage in the registers thereat in the mannerpreviously described.

The manner in which the equipment proceeds thereafter will be apparentfrom the foregoing disclosure.

TERMINAL-PER-LINE ARRANGEMENTS The identification procedure andconnections are altered in the systems which have the subscriber linesconnected according to a terminal-per-line pattern. That is, as noted indetail heretofore, the line entrance originating designation for theline in such system is the same as the connector terminal designationfor the line, and different party digits are dialed for the purpose ofringing different parties on the line. With specific reference to FIGURE3 there is shown therein the connections of two stations 11111 and 11112to the party line 1111. As will be apparent with consideration of FIGURE3, the P-wire for a party line is connected common to a single connectorterminal, such as illustrated terminal 1111, whereas in FIGURE 2 theP-wire of a party line is connected to various connector P-wireterminals associated with called parties on the line.

More specifically, the first four digits in the terminalper-linearrangement lshown identify the number of the subscriber line and thefifth digit designates the party on such line. It is apparent thereforethat the line entrance originating designation 111=1 is the same as theconnector terminal designation for such line. The last or party digitwhen dialed into a yconnector enables the connector to select the properringing frequency corresponding to the called party on the line. Thesame party digit is used for ltoll ticketing purposes and `in sucharrangement the party digit is dialed directly into the party register260 of the register-sender 104. The operation` of the system is similarin some respects to that set forth hereinibefore. In theterminal-per-line arrangement, however, the survey circuit 250 of theidentier 107 in its .scan across the terminals will effect the sameregistration for a calling subscinber line, such Ias line 111,1,regardless of the particular station `such as 11111 or 11112 whichoriginates the call. These identification digits are stored in thestation registers 257 in the -manner of the previously describedconnections. It should be recalled that there is a resistor network foreach `connector terminal in both the terminal-per-line and the`conductor K to the register-sender 104 to indicate that the party digitstored in party register 261 is to be punched line orterminal-per-station pattern.

, lllon the tape following the punching of the calling line number.

Referring now to a call originating at the non-recorder office, if thatoffice is of the terminal-per-l-ine type, the trunk 116 zwill notcontain a party register, no party control circuit will be equipped, andthe identifier 1119 and resistor network 122 will be of kind shown inFIG- URE 3 for local line identification.

When a .calling subscriber in the non-recorder oice dials his callingparty digit it is stored only in the party register 260 inregister-sender 104 at the recorder office.

As in the terminal-per-station arrangement, the survey circuit 250 scanslead TC to determine whether the call originated over a trunk. If so, itscans the leads 'T1-T0 to determine the trunk grioup by means of thecrossconnect and stores the calling office code in the group ofregisters 253. Thereupon, the identifier sends a signal over the trunkto the non-recorder office, marking trunk circuit 116 to engage thecommon identifier 1&19 and tone circuit 120.

Thereupon the identiiier scans to determine the digits of the callingline number and pulses the sarne over the trunk into the registers `257of the register-sender 104 at the recorder office.

The sender part of the register-sender 104 pulses into the tape punchthe calling ofiice digits found in registers 253, the digits of the linenumber found in registers 257, and finally the party digit found inparty register 260.

SYSTEMS ARRANGEMENTS It should be observed that the recorder office maybe of either terminal-per-line or terminal-per-station type and that itmay serve several non-recorder oices, each of which may be of eitherterminal-.per-line or terminalper-station type. Any terminal-per-stationnon-recorder -oflice will have local identification equipment similar tothe local identification equipment of FIGURE 2; and any terminal-perlinenon-recorder ofiice will have local identification equipment similar tothe local identification equipment of FIGURE 3.

When the associated recorder ofiice receives a call from a non-recorderofiice, it ascertains via the trunk identification equipment thenon-recorder otiice at which the call originated, and by means of thecross-connect knowswhether that ofiice is connected in a terminal-per-If the originating loffice is connected according to a terminal-per-linepattern, the cross-connect gives a signal over lead K to register-sender104, to indicate that the digit stored in party digit register 260 is tobe punched on the tape. If the originating office is connected accordingto a terminal-per-station pattern, the cross-connect does not gi-ve thissign-al over lead K, and accordingly the digit stored in register 260 isnot punched on the tape.

SPECIFIC CONSIDERATIONS For purposes of space and economy, theresistors, such as 202, 203, etc., for twenty connector terminals arelocated on a printed circuit card about 8 high by 4 wide. Cards arestacked like books on a shelf, twentyfive cards (500 lines or 500stations) occupying the width of a 19" frame. Terminals along `the frontedges of the cards are connected to the test wires (iP-wires) of thelines, and the terminals on the back edges are connected to a bare wiremultiple forming `the identification leads.

Since high resistance values are used, the tone voltage should be highin order to deliver an adequate sign-al to out excessive powerrequirement. i

With high tone voltage, the frequency either should be low to minimizeinduction into voice circuits, or should n be above the voice range sothat induction would be in 'l5 audible. A high yfrequency is notdesirable, however, because the high impedance from test wire to groundon idle lines would permit considerable induction into other test wiresthrough switchboard cable capacity, inviting the possibility of falsedetector response.

A tone frequency of 200 cycles has been chosen since it is low enough toavoid induction problems, but high enough to avoid certain drawbacks ofvery low frequencies, such as slower detector response and more awkwardcomponent Values in the generator and detector.

The recti-iiers for terminal-per-station oiiices consist of't diameterselenium discs stacked in a Bakelite tube with terminals projecting troma slot in the side of the tube. A tube about long holds 20 rectiiiers.The rectiiier tubes are mounted below the resistor cards, with jumpersrunning from terminals on the front edges of the cards to the terminalson the rectifiers.

While certain preferred embodiments of the invention have been shown anddescribed herein, it is apparent that modifications and alterations maybe made which include the basic concepts of the invention, and it isintended in the appended claims to cover all such modiiications andalterations as may fall within the tr-ue lspirit and scope of theinvention.

What is claimed is:

1. In an automatic telephone system having switching means forestablishing connections between subscriber `lines in the exchanges inthe system, and ticketing equipment for mia-king a record of at leastcertain of said connections; a common marking means including aplurality of marking members, each of which is operative as energized torepresent a predetermined value of a digit of a calling subscriberdirectory number, a plurality of identication marking means, each ofwhich is connected to represent a subscriber directory number, each ofsaid identilication marking means including a plurality ofidentification elements connected to the ones of said marking members insaid common marking means which correspond to the digits of thedirectory number assigned to its associated subscriber line, signalmeans operative responsive to lthe establishment of certain connectionsover said switching means by calling subscriber to apply signals overthe established connection to the identication marking means for thecalling line and the ones of the common marking members connectedthereto, and a common detector means operative in each lineidentification cycle to scan each of said marking members according to apredetermined pattern and to provide signals indicating the ones of theconductors having said marking signals thereon.

2. In an automatic telephone system having switching `means forestablishing connections between subscriber lines in the exchanges ofthe system, and ticketing equipment ,for making a record of at leastcertain of said connections; a common marking means including aplurality of marking members, each of which is operative as energized torepresent a predetermined value of a digit of the directory number of acalling subscriber, an identitication marking means for each subscriberline comprisin-g a plurality of resistor members, each of which resistormembers of an identification marking means for a line is connectedbetween its associated line and the ones of the common marking memberswhich correspond to the digits of the directory number assigned to itsassociated line, signal means connected for use by said ticketing meansresponsive to the establishment of a connection over said switchingmeans in the direction of a desired subscriber to 'apply signals backover the established connection and lthe calling line to the resistormembers of the marking means for the calling line and the ones of thecommon marking members connected thereto, and a common circuit detectormeans including a common detector and sur- Y vey means operative in eachidentication of a line to conf nect each of said marking members atdifferent intervals to said detector circuit according to apredetermined pattern to determine the ones of the'marking members whichhave said marking signals thereon.

3. in an automatic telephone system having switching means forestablishing connections between subscriber lines in the exchanges ofthe system, and ticketing equipment for making a record of at leastcertain of said connections; a common marking means including aplurality of marking members, each of which is operative when energizedto represent a predetermined digit, an identitication marking means foreach subscriber line, the marking means for a line comprising aplurality of resistor members connected .between its associated line andthe diiierent ones of the marking members in the common marking meanswhich correspond to the digits of theV directory number of itsassociated line, signal means operative responsive to the establishmentof a connection including the test conductor of certain of saidswitching means to apply signals over said test conductor to theresistor members for the calling line and the ones of the common markingmembers connected thereto, and a common detector means including acommon detector circuit, and survey means operative in eachidentification of a line to connect each of said mar-king members atdifferent intervals .to said detector circuit according to apredetermined sequence to determine the ones of the marking membershaving said marking signals thereon.

d. In an automatic telephone system having switching means forestablishing connections between subscriber lines in lthe exchanges of asystem, and ticketing equipment for making a record of at least certainof said connections; a common marking means including a plurality ofmarking members, each of which is operative as energized to represent apredetermined digit, an identification marking means rfor eachsubscriber line, Veach marking means comprising a plurality of membersconnected to the ones of said common marking members which correspond tothe digits of the directory number assigned to its associated subscriberline, signal means operative responsive to the establishment of certainconnections over said switching means in the direction of a desiredsubscriber line to apply signals over the established connection to theidentiiication marking means for the calling line and the ones of thecommon marking members connected thereto, a common detector meansincluding a common detector circuit, and survey means operative in eachidentiiication of a line to connect each of said common marking membersat different intervals to said detector circuit according to apredetermined pattern to determine the ones of the marking membershaving said marking signals thereon, including means for `transmittingthe markings determined by said detector means to said ticketingequipment, and register means in said ticketing equipment forregistering a preassigned identification party digit as dialed by thecalling subscriber and the directory number of the lines as receivedfrom said detector means.

5. In an automatic telephone system having switching means forestablishing connections between subscriber lines in the exchanges of asystem, and ticketing equipment for making a record of at least certainof said connections and in which a party line calling subscribertransmits an identiiication digit in the establishment of said certainconnections; a common marking means including a plurality of markingmembers, each of which is operative as energized to represent apredetermined digit, an identiiication marking means for each subscriberon a line, each of which comprises an individual set of marking devices,the marking devices for each of the different subscribers beingconnected between the subscriber line and the ones of said markingmembers in the common marking means which correspond to the digits ofthe directory number assigned to its associated subscriber, signal meansoperative responsive to the establishment of certain connections oversaid switching means to apply signals over l 7 said connection and thecalling line to the marking devices and the marking members connectedlthereto, discriminator means operatively ycontrolled by theidentification digit transmitted by the calling party for renderingineffective the identiiication marking means for subscribers` on thecalling line other than the calling subscriber :and for enabling theidentification marking means for the calling subscriber, and detectormeans operative to scan said marking members according to apredetermined pattern to determine the ones of the marking membershaving said marking signals thereon.

6. In an automatic telephone system having switching means forestablishing connections between subscriber lines in the exchanges of `asystem, certain of said lines having more than one subscriber connectedthereto, and ticketing equipment for making a record of at least certainof said connections; a common marking means including a plurality ofmarking members, each of which is operative as energized to represent apredetermined digit, an identification marking means for each subscribersta tion on a line, each of which comprises a plurality of markingdevices, the devices of the identification marking means for each of thedifferent subscriber stations being connected between its associatedline and the ones of said marking members which correspond to the digitsof the directory number assigned to the associated subscriber station,signal means operative responsive to the establishment of certaiinconnections over said switching means to apply signals back over theestablished connection to the calling line to the interconnected ones ofthe common marking members, detector means operative to scan each ofsaid marking members according to a predetermined pattern to determinethe ones of the marking members which have said marking signals thereon,and discriminator means for rendering effective only the marking meansassociated with the calling subscriber of the different subscribers on aline comprising party control means operatively controlled to enableonly the identification marking means for the subscriber on the lineindicated by the numerical value of the party digit dialed by thecalling subscriber.

7. In an automatic telephone system having a plurality of exchanges,switching means for establishing connections between subscriber lines inthe exchanges, and ticketing equipment for making a record of at leastcertain of said connections; certain of said lines having a plurality ofsubscribers connected thereto, each subscriber on a line having adifferent party digit preassigned thereto for transmission by thesubscriber for identification purposes in the establishment of at leastsaid certain connections, an identification matrix including a uniqueinput point to said matrix for each station in each multi-party line,and a common marking means for marking the digits of the directorynumber of each calling subscriber, identication marking means for eachsubscriber on a line, each of which is connected between its associatedline and said marking means to identify each of said subscribersthereto, means operative responsive to the establishment of certainconnections over said switching means to apply signals over theidentification marking means connected to the calling line to the commonmarking means, and discrimination means operatively controlled by theparty digit dialled by the calling subscriber to enable only theidentification marking means for the calling one of the subscribers onthe line.

8. In an .automatic telephone system as set forth in claim 7 in whichsaid means for applying signals to said identification marking meanscomprises a tone generator for coupling alternating current signals overthe calling line and the identification marking means for such line tothe common marking means, and which includes a tone detector,` and meansfor connecting said tone detector to said common marking means in agiven sequence to determine the ones of the common marking means whichare marked with said tone and thereby the subscriber directory numbermarked thereon.

9. In an automatic telephone system having a plurality of exchanges,switching means for establishing connections between subscriber lines inthe exchanges, and ticketing equipment for making a record of at leastcertain of said connections; certain of said lines having a plurality ofsubscribers connected thereto, each subscriber on a line having adifferent party digit preassigned thereto for transmission by thesubscriber for identification purposes in the establishment of at leastsaid certain connections, common marking means for marking the digits ofthe directory number of a calling subscriber, identification markingmeans for each subscriber station on a line connected between said lineand said marking means to identify each of said subscribers thereto,means operative responsive to the establishment of certain connectionsover said switching means to apply marking signals over theidentification marking means for the calling line, and discriminationmeans operatively controlled by the dialing of said party digit by thecalling subscriber to enable only the identification marking means forthe calling one of the subscribers on the line, including a plurality ofparty control means, each party control means being connected torepresent a different predetermined party digit, a shunt means for eachidentification marking means for each party on a line for shunting themarking signals applied to the line relative to its associatedidentification means, and means for controlling the ones of the partycontrol means other than the party control means indicated by the valueof the party digit transmitted by the calling subscriber to enable theshunt circuit for the identification marking means of the other partieson the line.

lit. In an automatic telephone system as set forth in claim 9 whichincludes means for connecting each of said party control means in commonfor the subscribers on the diiierent lines which have the position onthe line represented by the corresponding party control means.

11. ln an automatic telephone system as set forth in claim 9 whichincludes means for connecting each of said party control means in commonfor the subscribers on the different lines which have similar positionson the different lines, and in which said ticketing equipment includesregister means having means for registering the identifying party digitas received from the calling subscriber, and means for effectingoperation of the party control means other than the one of the partycontrol means indicated by the Value of the registered digit in responseto the transmission of a predetermined number of the digits of thecalled number from said register means.

12. In an automatic telephone system having a plurality of exchanges,switching means including a plurality of groups of trunk circuits forestablishing connections between subscriber lines in a plurality ofexchanges, and ticketing equipment for making a record of at leastcertain of said connections; common marking means including a iirstmarking means for marking the call as including a trunk circuit in theoriginating connection, and a second marking means for marking theassigned group of the calling trunk, identification marking meansconnected from each trunk to said first and second marking means, meansoperative responsive to the establishment of a connection over saidswitching means in the direction of a desired subscriber to applysignals over said connection and the calling trunk to the identificationmarking means for the calling trunk and the ones of the common markingmembers connected thereto including said iirst marking means, anddetector means operative to first scan said first means to detect amarking indicating the connection is extended over a trunk circuit, andmeans operative only responsive to detection of such condition tocontrol said detector means to scan said second means to determine thegroup indicated thereon.

13. In a telephone system, a multiparty line connected to a line circuithaving a control lead, each station on said multiparty line adapted tooriginate calls, a signal voltage, a matrix having a unique input pointfor each station on said line, means for applying said signal voltageto'said control lead responsive to any one of said stations originatinga call, and means for selectively transmitting said signal voltage tothe matrix input point corresponding to the station originating the callwhereby said station may be identified.

14. In a telephone system, a multiparty line connected to a line circuithaving a control lead, each station on said multiparty line adapted tooriginate calls, a signal voltage, a matrix having a unique inputterminal for each station on said line, means for registeringinformation indicative of the station on said line originating a call,means for applying said signal voltage to said control lead responsiveto any one of said stations originating a call,

and means controlled in accordance with said registered information forselectively transmitting said signal voltage to the matrix inputterminal corresponding to the station originating a call whereby saidstation may be identified.

1S. In a telephone system, a multiparty line connected to a line circuithaving a control lead, each station on said multiparty line adapted tooriginate calls, an electrical signal, a matrix having a unique inputpoint for a unique identification means for each station on said line,means for applying said electrical signal to said control leadresponsive to any one of said stations originating a call, and means forselectively transmitting said electrical sig nal on the control leadover only the unique identification means which corresponds to thestation originating the call, whereby said station may be identified.

16. In a telephone system, a multiparty line connected to a line havinga control lead, each station on said Vmultiparty line adapted tooriginate calls, an electrical signal, a matrix having a unique inputterminal for a unique identification means for each station on saidline, means for registering information indicative of the station onsaid line originating a call, means for applying said electrical signalt-o said control lead responsive to any one of said stations originatinga call, and means controlled in accordance with said registeredinformation for selectively transmitting said electrical signal overonly the unique identification means corresponding to the stationoriginate ing a call and its unique terminal, whereby said station maybe identified.

17. In a telephone system, a multiparty line connected to a line circuithaving a control lead, each station on said multiparty line adapted tooriginate calls, a matrix having a unique input terminal and anassociated unique identification means for each station on said line, atwo terminal device individual to each station on said line, means forconnecting the first terminal of each of said evices to said controllead, means for individually connecting the second terminals of saiddevices to individual ones of said matrix input terminals, an electricalsignal, enabling means for each station connected to the second terminalof the device and the matrix input terminal for the station, and meansresponsive to any one of said stations originating a call forselectively controlling the enabling means for the calling station tocomplete a path for the electrical signal which extends from saidcontrol lead over the two terminal device individual to the callingstation, the matrix input terminal corresponding to said calling stationand only the unique identification means for said calling station sothat an identification may be made of said station.

18. In a telephone system, a multiparty line connected to a line circuithaving a control lead, each station on said multiparty line adapted tooriginate calls, an electrical signal, a matrix having a unique inputterminal for unique identification means for each station on said line,a two terminal electrical device individual to each station on saidline, each device interposed in a connection between its individuallyassociated matrix input terminal and the control lead, means forapplying said electrical signal to said control lead in response to anyone of said stations on said line originating a call, and circuit meansfor each device effective in one condition to establish current fiowfrom the control lead over the associated matrix input terminal and itsidentification means, and effective in a second condition to preventcurrent flow over its associated identification means; and means forplacing said circuit means in said first condition whenever itsassociated station originates a call whereby said electrical signal maybe selectively conducted over only the unique identification meanscorrespon-ding to said calling station.

i9. ln a telephone system, a multiparty line connected to a line circuithaving a control lead, each station of said multiparty line adapted tooriginate calls, an electrical signal, a matrix having a Aunique inputterminal for a unique identification means for each station on saidline, a two terminal electrical device individual to each station onsaid line, each device interposed in a connection between itsindividually associated matrix input terminal and the control lead,enabling means for each device having a first condition which iseffective to prevent current flow from the control lead over itsassociated identification means, and a second condition which permitscurrent flow from the control lead over the device, its associatedmatrix input terminal and its associated identification means, saidsecond condition being obtained in response to the conjoint applicationof said signal voltage to said control lead and `operation of theassociated enabling means to said second condition, means forregistering information indicative of the station on said lineoriginating a call, and means controlled in accordance with saidregistered information for operating said enabling means individual tosaid originating station to said second condition, where- .by saidsignal voltage may be conducted over the device individual to the matrixinput `terminal corresponding to said calling station and over only theunique identification means for the station, so that an identificationmay be made of said station.

20. In a telephone system, a multiparty line connected to a line circuithaving a control lead, each station on said multiparty line adapted tooriginate calls, an electrical signal, a matrix having common markingmeans, and a unique input point for a unique identification means foreach station on said line, means for applying said electrical signal tosaid control lead responsive to any one of said stations originating acall, enabling means for each of the identification means for saidstations connected to the corresponding ones of the matrix input points,and means for selectively controlling the enabling means to effect thetransmission of said electrical signal on the control lead over only theidentification means corresponding to the station originating the call,whereby said station may be identified on said common marking means, andto prevent said electrical signal from transmission over the otheridentification circuits associated with said line to said common markingmeans.

2l. In a telephone system, a multiparty line connected to a line circuithaving a control lead, each station on said multiparty line adapted tooriginate calls, an electrical signal, a single matrix including acommon set of marking means for marking each digit of the directorynumber of each of said calling stations, a unique input point to saidmatrix for each station on said line, unique identification means foreach station coupled to the matrix input point forV the station and tothe ones of said common marking means which identify the digits in thedirectory number of said calling station, means for applying saidelectrical signal to said control lead responsive to any one of saidstations originating a call, enabling means for each of theidentification means for said stations on said line, and means forselectively controlling the enabling means to effect the transmission ofsaid electrical signal on the control lead over only the uniqueidentification means for the 21 station originating the call to mark thecommon marking means which are coupled thereto.

22. In a telephone system, a multiparty line connected to a line circuithaving a control lead, each station on said multiparty line adapted tooriginate calls, a single identication matrix including a unique inputpoint to said matrix for each station on said line and a common markingmeans for marking the digits of the directory number of each of saidcalling stations, each digit having an order in said number and adecimal value Within said order, said matrix including different commonmarking means for each digit in each order, unique identification meansfor each station on said line electrically coupled to the plurality ofcommon marking means which repredirectory number, the identificationmeans for different directory numbers being coupled to the same commonmarking means for each of the digits thereof having the same value inthe same order, an electrical signal, means responsive to any one ofsaid stations on said line originating a call for controllingthetransmission of said electrical signal over said control lead, andenabling means selectively operative to control transmission of saidelectrical signal on the control lead over only the identification meansfor the calling station to the common marking means coupled thereto.

No references cited.

sent the orders and decimal Values of the digits in its 15 ROBERT H-ROSE, Primary Examiner- UNITED STATES PATENT OFFICE CERTIFICATE OFCORRECTION Patent No 3,188,395 .June 8, 1965 William H. Blashfield It ishereby certified that error appears in the above numbered patent.requiring correction and that the said Letters Patent should read ascorrected below.

Column 20, line 3l, after "call, insert means for applying said signalto said Control lead in response to any one of said stations originatinga call,

Signed and sealed this 7th day of December 1965.

(SEAL) Attest:

ERNEST W. SWIDER EDWARD J. BRENNER Attcsting Officer Commissioner ofPatents

1. IN AN AUTOMATIC TELEPHONE SYSTEM HAVING SWITCHING MEANS FORESTABLISING CONNECTIONS BETWEEN SUBSCRIBER LINES IN THE EXCHANGES IN THESYSTEM, AND TICKETING EQUIPMENT OF MAKING A RECORD OF AT LEST CERTAIN OFSAID CONNECTIONS; A COMMON MARKING MEANS INCLUDING A PLURALITY OF MAKINGMEMBERS, EACH OF WHICH IS OPERATIVE AS ENERGIZED TO REPRESENT APREDETERMINED VALUE OF A DIGIT OF A CALLING SUBSCRIBER DIRECTORY NUMBER,A PLURALITY OF INDENTIFICATION MARKING MEANS, EACH OF WHICH IS CONNECTEDTO REPRESENT A SUBSCRIBER DIRECTORY NUMBER, EACH OF SAID IDENTIFICATIONMAKING MEANS INCLUDING A PLURALITY OF IDENTIFICATION ELEMENTS CONNECTEDTO THE ONES OF SAID MARKING MEMBERS IN SAID COMMON MARKING MEANS WHICHCORRESPOND TO THE DIGITS OF THE DIRECTORY NUMBER ASSIGNED TO ITSASSOCIATED SUBSCRIBER LINE, SIGNAL MEANS OPERATIVE RESPONSIVE TO THEESTABLISHMENT OF CERTAIN CONNECTIONS OVER SAID SWITCHING MEANS BYCALLING SUBSCRIBER TO APPLY SIGNALS OVER THE ESTABLISHED CONNECTION TOTHE INDENTIFICATION MARKING MEANS FOR THE CALLING LINE AND THE ONES OFTHE COMMON MARKING MEMBERS CONNECTED THERETO, AND A COMMON DETECTORMEANS OPERATIVE IN EACH LINE INDENTIFICATION CYCLE TO SCAN EACH OF SAIDMARKING MEMBERS ACCORDING TO A PREDETERMINED PATTERN AND TO PROVIDESIGNALS INDICATING THE ONES OF THE CONDUCTORS HAVING SAID MAKING SIGNALTHEREON.
 13. IN A TELEPHONE SYSTEM, A MULTIPARTY LINE CONNECTED TO ALINE CIRCUIT HAVING A CONTROL LEAD, EACH STATION ON SAID MULTIPARTY LINEADAPTED TO ORIGINATE CALLS, A SIGNAL VOLTAGE, A MATRIX HAVING A UNIQUEINPUT POINT OF EACH STATION ON SAID LINE, MEANS FOR APPLYING SAID SIGNALVOLTAGE TO SAID CONTROL LEAD RESPONSIVE TO ANY ONE OF SAID STATIONSORIGINATING A CALL, AND MEANS FOR SELECTIVELY TRANSMITTING SAID SIGNALVOLTAGE TO THE MATRIX INPUT POINT CORRESPONDING TO THE STATIONORIGINATING THE CALL WHEREBY SAID STATION MAY BE INDENTIFIED.